Test Preparation for DTC Readout
1. Connect Hand-Held Tester (HHT) to data link connector (X11/4) according to connection diagram (see section 0).
2. Ignition: ON.
3. Read DTC memory for transmission control module (N15/1).
(if no DTC's are stored im DTC memory which are relative to the complaint, perform entire Electrical Test Program 23
|
 |
DTC
 |
Possible cause |
Test step/Remedy 1) |
- |
No fault in system |
In case of complaint: 23 (entire test) |
   |
Engine control module (N3/4) does not match TCM (N15/1) |
Reset and reactivate engine control module:
See DM, Engines, Vol. 2, section 1.1 >11
|
   |
Transmission overload protection switch 4GR/5GR |
23 9.0
Read out DTC memory for DI control module (N1/3) and Engine control module (N3/4):
See DM, Engines, Vol. 2, section 5.2 to 5.3 >11 or 1.1 >11
|
   |
CAN data line from EA/CC/ISC control module (N4/1) distorted |
23 10.0
Read out DTC memory for EA/CC/ISC control module (N4/1)
See DM, Engines, Vol. 3, section 6.2 to 6.4 >11
|
   |
CAN data line from DI control module (N1/3) or HFM-SFI control module (N3/4) distorted |
23 10.0
Read out DTC memory for DI control module (N1/3) and Engine control module (N3/4):
See DM, Engines, Vol. 2, section 5.2 to 5.3 >11 or 1.1 >11
|
1) Observe Preparation for Test, see 22. |
DTC
 |
Possible cause |
Test step/Remedy 1) |
   |
CAN data line distorted |
23 10.0.
Read out DTC memory for EA/CC/ISC control
module (N4/1): DM, Engines, Vol.3, section 6.2 to 6.4 11
Read out DTC memory for DI control module (N1/3) and Engine control module (N3/4): DM, Engines, Vol. 2, section 5.2 to 5.3 12 or 1.1 12
Read out DTC memory for ABS/ASR or ASR/SPS control module (N30/1 or 47-1): DM, Chassis and Drivetrain, Vol. 2, section 5.2 12
DM, Chassis and Drivetrain, Vol. 3, section 9.1 and 9.3 12 |
   |
Valve block control valve (Y3/1y2), open circuit orTCM (N15/1)
|
23 4.0
Replace N15/1 |
   |
TCM (N15/1) |
Replace N15/1
|
  2) |
Valve block control valve (Y3/1y2) |
23 4.0
|
   |
Valve block control valve (Y3/1y2), short circuit |
23 4.0 |
1) Observe Preparation for Test, see 22.
2) If DTC is displayed, it may be attributable to previous repair work done on the vehicle. For example, the valve block connector (Y3/1x1) on the transmission was not connected/reconnected while the engine was idling > 1000 rpm. Clear DTC by using HHT. Start engine and idle at > 1000 rpm for approximately 10 seconds, check DTC with HHT, if DTC reappears, see 23 9.0. |
|